A mute switch

ABSTRACT

The utility model discloses a silent switch, which includes a base and an upper cover disposed above the base. The upper cover is combined together with the base to form an accommodation cavity, and a guide core is provided inside the accommodation cavity, which includes at least one upper silencing pad arranged at the upper portion of the inner side of the accommodation cavity, and at least one lower silencing pad arranged at the lower portion of the inner side of the accommodation cavity; The lower silencing pad buffers and silences the impact force of the guide core moving down, and the upper silencing pad buffers and silences the impact force of the guide core moving up and resetting. The silent switch provided by the utility model realizes the silencing effect when pressing down and springing up to reset.

TECHNICAL FIELD

The utility model relates to the field of key switches, in particular to a silent switch.

BACKGROUND ART

When the key switch is in use, the pressing axis of the key will touch the base when it is pressed, and touch the upper cover when it springs up, so it is easy to make noise when it is pressed down and released.

In order to achieve the silencing of the key switch, the common way is to add an elastic gasket or washer under the key to form a buffer, thus reducing the key sound. With this structure, the silencing can only be realized when the key is pressed down, but after the key springs up, it will still make a sound when it hits the top of the upper cover by pressing the shaft, so the silencing cannot be completely realized.

Summary of the Utility Model

In view of the above shortcomings, the utility model aims to provide a silent switch, which can realize the silencing effect when it is pressed and spring to reset.

The technical scheme adopted by the utility model to achieve the above purpose is:

A silent switch, including a base and an upper cover disposed above the base, wherein the upper cover is combined together with the base to form an accommodation cavity, and a guide core is provided inside the accommodation cavity, characterized in that, it also includes at least one upper silencing pad arranged at the upper portion of the inner side of the accommodation cavity and at least one lower silencing pad arranged at the lower portion of the inner side of the accommodation cavity; the lower silencing pad buffers and silences the impact force of the guide core moving downwards, and the upper silencing pad buffers and silences the impact force of the guide core moving upwards and resetting.

As a further improvement of the utility model, the upper silencing pad is arranged at the upper end of the guide core and faces the top wall of the accommodation cavity, and the lower silencing pad is arranged on the base and below the guide core; in the natural state, the upper silencing pad is in contact with the top wall of the accommodation cavity, and in the working state, the guide core is in contact with the lower silencing pad.

As a further improvement of the utility model, the upper silencing pad is arranged on the upper cover and on the top wall of the accommodation cavity, and the lower silencing pad is arranged on the base and below the guide core; in the natural state, the guide core is in contact with the upper silencing pad, and in the working state, the guide core is in contact with the lower silencing pad.

As a further improvement of the utility model, the upper silencing pad is integrally injected molding on the upper cover, or is assembled on the upper cover.

As a further improvement of the utility model, the lower silencing pad mainly consists of a central ferrule and two silencing contact pieces oppositely connected to both sides of the central ferrule.

As a further improvement of the utility model, a first guide post is protruded upward on the base, and a first guide hole is formed in the central axis direction of the first guide post; the central ferrule is arranged at that periphery of the first guide post; the lower end of the guide core extends downward and is provided with a first insertion shaft inserted into the first guide hole, and a first return spring is sleeved on the periphery of the first insertion shaft.

As a further improvement of the utility model, the lower silencing pad is integrally injected molding on the base, or is assembled on the base.

As a further improvement of the utility model, a second guide post is protruded upward on the base, a second guide hole is formed in the direction of the central axis of the second guide post, and a second insertion shaft inserted into the second guide hole extends downward from the lower end of the guide core; the upper silencing pad is arranged on the guide core and faces the top wall of the accommodation cavity, and the lower silencing pad is arranged in the second guide hole and below the second insertion shaft; in the natural state, the upper silencing pad is in contact with the top wall of the accommodation cavity, and in the working state, the second insertion shaft of the guide core is in contact with the lower silencing pad.

As a further improvement of the utility model, a first silencing buffer is integrally injected molding into the guide core, and the first silencing buffer is exposed from the upper side of the guide core to form the upper silencing pad.

As a further improvement of the utility model, the lower silencing pad is integrally injected molding into the second guide hole of the base, or is assembled in the second guide hole of the base.

As a further improvement of the utility model, a second return spring is sleeved on the periphery of the second insertion shaft.

As a further improvement of the utility model, a third guide post is protruded upward on the base, a third guide post is protruded upward on the base, a third guide hole is formed in the central axis direction of the third guide post, a third insertion shaft inserted into the third guide hole extends downward from the lower end of the guide core, and a second silencing buffer is arranged on the guide core, which includes the upper silencing pad facing the top wall of the accommodation cavity and the lower silencing pad arranged at the lower end of the insertion shaft; in the natural state, the upper silencing pad is in contact with the top wall of the accommodation cavity, and in the working state, the lower silencing pad is in contact with the inner bottom of the third guide hole.

As a further improvement of the utility model, the second silencing buffer is integrally injected molding into the guide core, and the second silencing buffer is exposed from the upper side of the guide core to form the upper silencing pad, and exposed from the lower end of the insertion shaft to form the lower silencing pad.

As a further improvement of the utility model, a third return spring is sleeved on the periphery of the third insertion shaft.

As a further improvement of the utility model, a cavity is reserved in the guide core, and a third silencing buffer is integrally injected molding into the cavity, the third silencing buffer is exposed from the upper side of the guide core to form the upper silencing pad, and the third silencing buffer is exposed from the lower side of the guide core to form the lower silencing pad; in the natural state, the upper silencing pad is in contact with the top wall of the accommodation cavity, and in the working state, the lower silencing pad is in contact with the bottom wall of the accommodation cavity.

As a further improvement of the utility model, the number of the lower silencing pads is two, which are respectively located on both sides of the guide core, and the lower silencing pads mainly consist of a plurality of protrusions.

As a further improvement of the utility model, the third silencing buffer mainly consists of a central rubber pad and a longitudinal rubber column integrally injected molding on both sides of the central rubber pad, wherein the upper silencing pad is formed at the upper end of the longitudinal rubber column and the lower silencing pad is formed at the lower end of the longitudinal rubber column.

As a further improvement of the utility model, a fourth guide post is protruded upward on the base, and a fourth guide hole is formed in the central axis direction of the fourth guide post; the lower end of the guide core extends downward and is provided with a fourth insertion shaft inserted into the fourth guide hole, a fourth return spring is sleeved on the periphery of the fourth insertion shaft, and the upper end of the fourth return spring contacts the central rubber pad.

As a further improvement of the utility model, the upper silencing pad and the lower silencing pad are soft rubber.

The utility model has the following beneficial effects: by arranging at least one upper silencing pad on the inner upper portion of the accommodation cavity formed by the combination of the upper cover and the base, and at least one lower silencing pad on the inner lower portion of the accommodation cavity, the lower silencing pad buffers and silences the impact force of the guide core moving down, and the upper silencing pad buffers and silences the impact force of the guide core moving up and resetting, thus, when the guide core is pressed and springed up and reset, the noise is reduced, and it is close to silence.

The above is an overview of the technical scheme of the utility model. The utility model will be further explained below with reference to the attached drawings and specific implementation methods.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an explosion diagram of Embodiment 1;

FIG. 2 is a schematic diagram of the external structure of Embodiment 1;

FIG. 3 is a cross-sectional view of Embodiment 1;

FIG. 4 is a schematic structural diagram of the combination of a guide core and an upper silencing pad in Embodiment 1;

FIG. 5 is a schematic diagram of the breakdown structure of the guide core and the upper silencing pad in Embodiment 1;

FIG. 6 is a structural schematic diagram of the lower silencing pad arranged on the base in Embodiment 1;

FIG. 7 is a structural schematic diagram of a lower silencing pad in Embodiment 1;

FIG. 8 is a partial structural diagram of Embodiment 1;

FIG. 9 is an explosion diagram of Embodiment 2;

FIG. 10 is a cross-sectional view of Embodiment 2;

FIG. 11 is a structural schematic diagram of the upper silencing pad arranged on the upper cover in Embodiment 2;

FIG. 12 is an explosion diagram of Embodiment 3;

FIG. 13 is a cross-sectional view of Embodiment 3;

FIG. 14 is a structural schematic diagram of the lower silencing pad arranged on the base in Embodiment 3;

FIG. 15 is an explosion diagram of Embodiment 4;

FIG. 16 is a cross-sectional view of Embodiment 4;

FIG. 17 is a structural schematic diagram of a base in Embodiment 4;

FIG. 18 is a structural schematic diagram of the upper silencing pad and the lower silencing pad arranged on the guide core in Embodiment 4;

FIG. 19 is a schematic diagram of the structure in which the guide core is separated from the upper silencing pad and the lower silencing pad in Embodiment 4;

FIG. 20 is an explosion diagram of Embodiment 5;

FIG. 21 is a cross-sectional view of Embodiment 5;

FIG. 22 is a structural schematic diagram of the upper silencing pad and the lower silencing pad arranged on the guide core in Embodiment 5;

FIG. 23 is a schematic diagram of the bottom structure of the upper silencing pad and the lower silencing pad arranged on the guide core in Embodiment 5;

FIG. 24 is a schematic diagram of the structure in which the guide core is separated from the upper silencing pad and the lower silencing pad in Embodiment 5;

FIG. 25 is a structural schematic diagram of a guide core in Embodiment 5.

DETAILED DESCRIPTION OF THE UTILITY MODEL

In order to further explain the technical means and efficacy adopted by the utility model to achieve the intended purpose, the specific implementation mode of the utility model will be explained in detail below with reference to the drawings and preferred embodiments.

EMBODIMENT 1

Please refer to FIGS. 1 to 3 , this embodiment provides a silent switch, which includes a base 1 and an upper cover 2 arranged above the base 1. The upper cover 2 is combined with the base 1 to form an accommodation cavity 3, and a guide core 4 is arranged in the accommodation cavity 3. At the same time, an opening 21 for pressing the upper end of the guide core 4 is arranged on the upper cover 2. In this embodiment, the silent switch further comprises at least one upper silencing pad arranged at the upper portion of the inside of the accommodation cavity 3 and at least one lower silencing pad arranged at the lower portion of the inside of the accommodation cavity 3. The lower silencing pad buffers and silences the impact force of the guide core 4 moving downward, and the upper silencing pad buffers and silences the impact force of the guide core 4 moving upward and resetting. Specifically, both the upper silencing pad and the lower silencing pad are soft rubber, and the soft rubber can play a very good role in buffering and silencing.

Specifically, in this embodiment, the upper silencing pad 5 is arranged at the upper end of the guide core 4 and faces the top wall of the accommodation cavity 3, and the lower silencing pad 6 is arranged on the base 1 and below the guide core 4; In the natural state, the upper silencing pad 5 is in contact with the top wall of the accommodation cavity 3, and in the working state, the guide core 4 is in contact with the lower silencing pad 6. Therefore, when the guide core 4 is pressed to move down to the bottom wall of the accommodation cavity 3, and the conduction component inside the switch is triggered to conduct electrically, the switch is in a working state, and the lower end of the guide core 4 touches the lower silencing pad 6, so that the lower silencing pad 6 buffers the impact force of the guide core 4 moving down, reduces the noise, and is almost silent, so as to achieve the silencing effect. When the pressing of the guide core 4 is released, and the guide core 4 moves up and resets to the initial state, the part that directly touches the top wall (upper cover 2) of the accommodation cavity 3 is the upper silencing pad 5 on the guide core 4, which buffers the impact force of the guide core 4 moving up and resetting, reduces the noise, and is almost silent, so as to achieve the silencing effect.

In this embodiment, as shown in FIGS. 4 and 5 , a first silencing buffer is integrally injected molding into the guide core 4, and the first silencing buffer is exposed from the upper side of the guide core 4 to form the upper silencing pad 5. Specifically, the upper silencing pad 5 is soft rubber, and the soft rubber can play a good role in buffering and silencing. During injection molding, the soft rubber is injected through the injection hole of the guide core 4, and the upper side of the guide core 4 has two exit holes, so that the soft rubber injected into the guide core 4 runs out, thereby forming the upper silencing pad 5.

Specifically, the number of the upper silencing pads 5 is two, which are respectively located on both sides of the upper portion of the guide core 4. When the guide core 4 moves up and resets to the initial state, the two upper silencing pads 5 directly touch the top wall (the upper cover 2) of the accommodation cavity 3, and the two upper silencing pads 5 buffer the impact force of the guide core 4 moving up and resetting, thus reducing the sound generation, which is beneficial to achieving the silencing effect.

In this embodiment, as shown in FIG. 6 and FIG. 7 , the lower silencing pad 6 mainly consists of a central ferrule 61 and two silencing contact pieces 62 oppositely connected to both sides of the central ferrule 61. Specifically, the lower silencing pad 6 is soft rubber, which can play a good role in buffering and silencing.

Meanwhile, a first guide post 11 is protruded upward on the base 1, and a first guide hole 12 is formed in the central axis direction of the first guide post 11; The central ferrule 61 is sleeved on the periphery of the first guide post 11; A first insertion shaft 41 inserted into the first guide hole 12 extends downward from the lower end of the guide core 4. At the same time, a first return spring 7 is sleeved on the periphery of the first insertion shaft 41, and the first return spring 7 provides elastic restoring force for the upward and resetting of the guide core 4.

There are the following two ways to combine the lower silencing pad 6 with the base 1:

(1) The lower silencing pad 6 is integrally injected molding on the base 1.

(2) The lower silencing pad 6 is assembled on the base 1.

No matter how the lower silencing pad 6 is combined with the base 1, as long as the guide core 4 moves down to the bottom wall of the accommodation cavity 3, the part directly touched is the lower silencing pad 6, which can achieve the function of buffering and reducing sound, so as to facilitate the silencing effect.

In order to further reduce the sound generated during pressing, the first insertion shaft 41 at the lower end of the guide core 4 can be made shorter, so as to prevent the first insertion shaft 41 from hitting the bottom of the first guide hole 12 to make sound when the guide core 4 moves down. The length of the first insertion shaft 41 is designed as long as it can ensure that the first insertion shaft 41 moves up and down in the first guide hole 12 during the up-and-down movement of the guide core 4.

In this embodiment, for the conduction component structure of the switch, it can be realized by adopting the static and dynamic plate structure, the light conduction structure, the magnetic conduction structure, the Hall conduction structure, etc. in the conventional key switches in the field. Below, taking the static and dynamic plate structure as an example, the conduction component structure of this embodiment will be explained:

As shown in FIG. 1 and FIG. 8 , a moving piece 8 and a stationary piece 9 are arranged on the base 1 and located in the accommodation cavity 3. When the guide core 4 is in a natural unpressed state, the moving piece 8 is pushed outward by the pressing block 41 on the side of the guide core 4, so that the moving contact on the moving piece 8 is separated from the stationary contact on the stationary piece 9, so as to achieve the disconnection function. When the guide core 4 moves down, the pressing block 41 on the side of the guide core 4 releases the outward force on the moving piece 8, so that the moving piece 8 is reset close to the stationary piece 9, and the moving contact on the moving piece 8 contacts with the stationary contact on the stationary piece 9, thus achieving the conduction function.

EMBODIMENT 2

The main difference between the present embodiment and Embodiment 1 is that the structure and location of the silencing pad in the present embodiment are different. Specifically, as shown in FIGS. 9 to 11 , the upper silencing pad 5′ of this embodiment is arranged on the upper cover 2 and on the top wall of the accommodation cavity 3, and the lower silencing pad 6 is arranged on the base 1 and below the guide core 4. In the natural state, the guide core 4 is in contact with the upper silencing pad 5′, and in the working state, the guide core 4 is in contact with the lower silencing pad 6. Therefore, when the guide core 4 is pressed to move down to the bottom wall of the accommodation cavity 3, and the conduction component inside the switch is triggered to conduct electrically, the switch is in a working state, and the lower end of the guide core 4 touches the lower silencing pad 6, so that the lower silencing pad 6 buffers the impact force of the guide core 4 moving down, reduces the noise, and is almost silent, so as to achieve the silencing effect. When the pressing of the guide core 4 is released, and the guide core 4 moves up and resets to the initial state, the guide core 4 directly touches the upper silencing pad 5′ on the upper cover 2, and the upper silencing pad 5′ buffers the impact force of the guide core 4 moving up and resetting, thus reducing the noise, and being close to silent, so as to achieve the silencing effect.

There are the following two ways for the combination of the upper silencing pad 5′ and the upper cover 2:

(1) The upper silencing pad 5′ is integrally injected molding on the upper cover 2.

(2) The upper silencing pad 5′ is assembled on the upper cover 2.

No matter how the upper silencing pad 5′ is combined with the upper cover 2, as long as the part directly touched is the upper silencing pad 5′ when the guide core 4 moves up and resets to the top wall of the accommodation cavity 3, the function of buffering and reducing sound can be achieved, so as to facilitate the silencing effect.

In this embodiment, specifically, the upper silencing pad 5′ is soft rubber, which can play a good role in buffering and silencing. Meanwhile, the number of the upper silencing pads 5′ is two, which are located on opposite sides, as shown in FIGS. 10 and 11 .

In this embodiment, the specific structure and installation position of the lower silencing pad 6 are the same as those of the first embodiment, and will not be repeated here.

EMBODIMENT 3

The main difference between the present embodiment and Embodiment 1 is that the structure and setting position of the lower silencing pad in this embodiment are different. Specifically, as shown in FIG. 12 to FIG. 14 , a second guide post 11′ is protruded upward on the base 1, a second guide hole 12′ is formed in the central axis direction of the second guide post 11′, and a second insertion shaft 41′ inserted into the second guide hole 12′ is extended downward at the lower end of the guide core 4, and the second insertion shaft 41′ is along the second guide hole 12 when the guide core 4 moves up and down. At the same time, a second return spring 7′ is sleeved on the periphery of the second insertion shaft 41′, and the second return spring 7′ provides elastic restoring force for the upward movement and return of the guide core 4.

In this embodiment, the upper silencing pad 5 is disposed on the guide core 4 and faces the top wall of the accommodation cavity 3, and the lower silencing pad 6′ is disposed in the second guide hole 12′ and below the second insertion shaft 41′; In the natural state, the upper silencing pad 5 is in contact with the top wall of the accommodation cavity 3, and in the working state, the second insertion shaft 41′ of the guide core 4 is in contact with the lower silencing pad 6′. Therefore, when the guide core 4 is pressed to move downwards, and the conduction component inside the switch is triggered to conduct electrically, the switch is in a working state, and the second insertion shaft 41′ of the guide core 4 touches the lower silencing pad 6′, so that the lower silencing pad 6′ buffers the impact force of the guide core 4 moving downwards, reduces the noise, and is close to silent, so as to achieve the silencing effect; when the pressing of the guide core 4 is released, and the guide core 4 moves up and resets to the initial state, the part that directly touches the top wall (upper cover 2) of the accommodation cavity 3 is the upper silencing pad 5 on the guide core 4, which buffers the impact force of the guide core 4 moving up and resetting, reduces the noise, and is almost silent, so as to achieve the silencing effect.

There are the following two ways to combine the lower silencing pad 6′ with the base 1:

(1) The lower silencing pad 6′ is integrally injected molding into the second guide hole 12′ of the base 1.

(2) The lower silencing pad 6′ is fitted in the second guide hole 12′ of the base 1.

No matter how the lower silencing pad 6′ is combined with the base 1, as long as the part directly touched by the second insertion shaft 41′ of the guide core 4 moves down to the bottom wall of the second guide hole 12′ is the lower silencing pad 6′, the function of buffering and reducing sound can be achieved, so as to facilitate the silencing effect.

As shown in FIG. 13 and FIG. 14 , the shape of the lower silencing pad 6′ matches the shape of the second guide hole 12′ of the base 1. Meanwhile, the lower silencing pad 6′ is soft rubber, which can play a good role in buffering and silencing.

In order to further reduce the sound emitted during pressing, the lower end of the guide core 4 can be made shorter except for the second insertion shaft 41′, so as to prevent the other parts except the second insertion shaft 41′ from hitting the bottom wall of the accommodation cavity 3 to make sound when the guide core 4 moves down. In the specific design, as long as it can be ensured that when the second insertion shaft 41′ moves down to contact the lower silencing pad 6′, the lower end of the guide core 4 does not contact the bottom wall of the accommodation cavity 3 except the second insertion shaft 41′.

In this embodiment, the specific structure and installation position of the upper silencing pad 5 are the same as those of the first embodiment, and will not be repeated here.

EMBODIMENT 4

The main difference between the present embodiment and Embodiment 1 is that the structure and setting position of the lower silencing pad in this embodiment are different. Specifically, as shown in FIG. 15 to FIG. 17 , a third guide post 11 “is protruded upward on the base 1, a third guide hole 12” is formed in the central axis direction of the third guide post 11 “, and a third insertion shaft 41” inserted into the third guide hole 12 “is extended downward at the lower end of the guide core 4, and the third insertion shaft 41” is along the third guide hole 12 when the guide core 4 is pressed to move up and down. At the same time, a third return spring 7 “is sleeved on the periphery of the third insertion shaft 41”, and the third return spring 7″ provides elastic restoring force for the upward movement and return of the guide core 4.

In this embodiment, as shown in FIG. 16 , FIG. 18 and FIG. 19 , a second silencing buffer is arranged on the guide core 4, and the second silencing buffer includes the upper silencing pad 5 facing the top wall of the accommodation cavity 3 and the lower silencing pad 6″ arranged at the lower end of the third insertion shaft 41″; In the natural state, the upper silencing pad 5 is in contact with the top wall of the accommodation cavity 3, and in the working state, the lower silencing pad 6″ is in contact with the inner bottom of the third guide hole 12″. Therefore, when the guide core 4 is pressed to move downwards, and the conduction component inside the switch is triggered to conduct electrically, the switch is in a working state, and the lower silencing pad 6″ at the lower end of the third insertion shaft 41” touches the inner bottom of the third guide hole 12 “of the third guide post 11”, so that the lower silencing pad 6″ buffers the impact force of the guide core 4 moving downwards, reduces the noise, and is close to silent, so as to achieve the silencing effect. When the pressing of the guide core 4 is released, and the guide core 4 moves up and resets to the initial state, the part that directly touches the top wall (upper cover 2) of the accommodation cavity 3 is the upper silencing pad 5 on the guide core 4, which buffers the impact force of the guide core 4 moving up and resetting, reduces the noise, and is almost silent, so as to achieve the silencing effect.

In this embodiment, as shown in FIG. 16 , FIG. 18 and FIG. 19 , the second silencing buffer is integrally injected molding into the guide core 4, and the second silencing buffer is exposed from the upper side of the guide core 4 to form the upper silencing pad 5, and the lower end of the third insertion shaft 41″ is exposed to form the lower silencing pad 6″. Specifically, the second silencing buffer is soft rubber, and the soft rubber can play a good role in buffering and silencing. During injection molding, the soft rubber is injected through the injection hole in the guide core 4, and since the upper side of the guide core 4 has two outlet holes and the lower end of the third insertion shaft 41 “has one outlet hole, the soft rubber injected into the guide core 4 can escape, thus forming the upper silencing pad 5 and the lower silencing pad 6”.

In order to further reduce the sound emitted during pressing, the lower end of the guide core 4 can be made shorter except for the third insertion shaft 41″, so as to prevent the other parts except the third insertion shaft 41″ from hitting the bottom wall of the accommodation cavity 3 to make sound when the guide core 4 moves down. In the specific design, as long as it can be ensured that the lower end of the guide core 4 does not contact the bottom wall of the accommodation cavity 3 except the third insertion shaft 41″ when the third insertion shaft 41″ moves down to contact the lower silencing pad 6″.

In this embodiment, the specific structure and installation position of the upper silencing pad 5 are the same as those of the first embodiment, and will not be repeated here.

EMBODIMENT 5

The main difference between the present embodiment and Embodiment 1 is that the structure and setting position of the lower silencing pad in this embodiment are different. Specifically, as shown in FIGS. 20 to 25 , a cavity 40 is reserved in the guide core 4. As shown in FIG. 25 , a third silencing buffer 50 is integrally injected molding into the cavity 40. The third silencing buffer 50 is exposed from the upper side of the guide core 4 to form the upper silencing pad 5, and the third silencing buffer 50 is exposed from the lower side of the guide core 4 to form the lower silencing pad 6″ ′. In the natural state, the upper silencing pad 5 is in contact with the top wall of the accommodation cavity 3, and in the working state, the lower silencing pad 6″′ is in contact with the bottom wall of the accommodation cavity 3. Therefore, when the guide core 4 is pressed to move down to the bottom wall of the accommodation cavity 3, and the conduction component inside the switch is triggered to conduct electrically, the switch is in a working state, and the lower silencing pad 6″′ of the third silencing buffer 50 touches the bottom wall (base 1) of the accommodation cavity 3, and the lower silencing pad 6′″ of the third silencing buffer 50 buffers the impact force of the guide core 4 moving down, thus reducing the generation of noise and being close to silence, so as to achieve silence. When the pressing of the guide core 4 is released, and the guide core 4 moves up and resets to the initial state, the part that directly touches the top wall (upper cover 2) of the containing cavity 3 is the upper silencing pad 5 of the third silencing buffer 50, and the upper silencing pad 5 of the third silencing buffer 50 buffers the impact force of the guide core 4 moving up and resetting, thus reducing the generation of noise and being almost silent, so as to achieve the silencing effect.

The third silencing buffer 50 of this embodiment can play a good role in buffering and silencing. During injection molding, the liquid soft rubber is injected through the injection hole of the guide core 4, and the upper side of the guide core 4 has two upper outlet holes and the lower side has two lower outlet holes, so that the liquid soft rubber injected into the guide core 4 runs out to mold the upper silencing pad 5 and the lower silencing pad 6″′.

Specifically, the number of the upper silencing pads 5 is two, which are respectively located on both sides of the guide core 4, as shown in FIG. 21 and FIG. 22 . When the guide core 4 moves up and resets to the initial state, the two upper silencing pads 5 directly touch the top wall (the upper cover 2) of the accommodation cavity 3, and the two upper silencing pads 5 buffer the impact force of the guide core 4 moving up and resetting, thus reducing the sound generation, which is beneficial to achieving the silencing effect.

Specifically, as shown in FIG. 22 and FIG. 23 , the number of the lower silencing pads 6″′ is two, which are respectively located on both sides of the guide core 4, and the lower silencing pads 6′″ are mainly composed of a plurality of protrusions 61. The number of protrusions 61 in each lower silencing pad 6″ is preferably three, as shown in FIG. 23 . When the guide core 4 is pressed to move down to the bottom wall of the accommodation cavity 3, and the conduction component inside the switch is triggered to conduct electrically, the switch is in a working state, and the protrusions 61 touch the bottom wall (base 1) of the accommodation cavity 3, and the protrusions 61 buffer the impact force of the guide core 4 moving down, so that the noise is reduced, and it is almost silent, so as to achieve the silencing effect.

In this embodiment, as shown in FIG. 24 , the third silencing buffer 50 is mainly composed of a central rubber pad 501 and a longitudinal rubber column 502 integrally injected molding at both sides of the central rubber pad 501, wherein the upper silencing pad 5 is formed at the upper end of the longitudinal rubber column 502, and the lower silencing pad 6′″ is formed at the lower end of the longitudinal rubber column 502.

Meanwhile, a fourth guide post 11 is convexly arranged on the base 1, and a fourth guide hole 12 is formed in the central axis direction of the fourth guide post 11; The lower end of the guide core 4 extends downward and is provided with a fourth insertion shaft 41 inserted into the fourth guide hole 12. A fourth return spring 7′″ is sleeved around the fourth insertion shaft 41, and the upper end of the fourth return spring 7′″ contacts the central rubber pad 501. The fourth return spring 7′″ provides elastic restoring force for the upward return of the guide core 4. Under the action of the elastic restoring force of the fourth return spring 7′″, the guide core 4 in the pressed state can be driven to move up and reset. During the downward and upward movement of the guide core 4, the upper end of the fourth return spring 7′″ touches the central rubber pad 501 of the third silencing buffer 50. Therefore, in the whole process, the impact force between the fourth return spring 7′″ and the guide core 4 is buffered by the central rubber pad 501 to reduce noise.

In order to further reduce the sound generated when pressing, the fourth insertion shaft 41 at the lower end of the guide core 4 can be made shorter, so as to prevent the fourth insertion shaft 41 from hitting the bottom of the fourth guide hole 12 to make sound when the guide core 4 moves down. The length of the fourth insertion shaft 41 is designed as long as it can ensure that the fourth insertion shaft 41 moves up and down in the fourth guide hole 12 during the up-and-down movement of the guide core 4.

In this embodiment, the specific structure and installation position of the upper silencing pad 5 are the same as those of the first embodiment, and will not be repeated here.

The above is only a preferred embodiment of the utility model, and does not limit the technical scope of the utility model. Therefore, other structures obtained by adopting the same or similar technical features as the above embodiments of the utility model are within the protection scope of the utility model. 

1. A silent switch, including a base and an upper cover disposed above the base, wherein the upper cover is combined together with the base to form an accommodation cavity, and a guide core is provided inside the accommodation cavity, characterized in that, it also includes at least one upper silencing pad arranged at the upper portion of the inner side of the accommodation cavity and at least one lower silencing pad arranged at the lower portion of the inner side of the accommodation cavity; the lower silencing pad buffers and silences the impact force of the guide core moving downwards, and the upper silencing pad buffers and silences the impact force of the guide core moving upwards and resetting.
 2. The silent switch according to claim 1, characterized in that, the upper silencing pad is arranged at the upper end of the guide core and faces the top wall of the accommodation cavity, and the lower silencing pad is arranged on the base and below the guide core; in the natural state, the upper silencing pad is in contact with the top wall of the accommodation cavity, and in the working state, the guide core is in contact with the lower silencing pad.
 3. The silent switch according to claim 1, characterized in that, the upper silencing pad is arranged on the upper cover and on the top wall of the accommodation cavity, and the lower silencing pad is arranged on the base and below the guide core; in the natural state, the guide core is in contact with the upper silencing pad, and in the working state, the guide core is in contact with the lower silencing pad.
 4. The silent switch according to claim 3, characterized in that, the upper silencing pad is integrally injected molding on the upper cover, or is assembled on the upper cover.
 5. The silent switch according to claim 2 or 3, characterized in that, the lower silencing pad mainly consists of a central ferrule and two silencing contact pieces oppositely connected to both sides of the central ferrule.
 6. The silent switch according to claim 5, characterized in that, a first guide post is protruded upward on the base, and a first guide hole is formed in the central axis direction of the first guide post; the central ferrule is arranged at that periphery of the first guide post; the lower end of the guide core extends downward and is provided with a first insertion shaft inserted into the first guide hole, and a first return spring is sleeved on the periphery of the first insertion shaft.
 7. The silent switch according to claim 2 or 3, characterized in that, the lower silencing pad is integrally injected molding on the base, or is assembled on the base.
 8. The silent switch according to claim 1, characterized in that, a second guide post is protruded upward on the base, a second guide hole is formed in the direction of the central axis of the second guide post, and a second insertion shaft inserted into the second guide hole extends downward from the lower end of the guide core; the upper silencing pad is arranged on the guide core and faces the top wall of the accommodation cavity, and the lower silencing pad is arranged in the second guide hole and below the second insertion shaft; in the natural state, the upper silencing pad is in contact with the top wall of the accommodation cavity, and in the working state, the second insertion shaft of the guide core is in contact with the lower silencing pad.
 9. The silent switch according to claim 2 or 8, characterized in that, a first silencing buffer is integrally injected molding into the guide core, and the first silencing buffer is exposed from the upper side of the guide core to form the upper silencing pad.
 10. The silent switch according to claim 8, characterized in that, the lower silencing pad is integrally injected molding into the second guide hole of the base, or is assembled in the second guide hole of the base.
 11. The silent switch according to claim 8, characterized in that, a second return spring is sleeved on the periphery of the second insertion shaft.
 12. The silent switch according to claim 1, characterized in that, a third guide post is protruded upward on the base, a third guide hole is formed in the central axis direction of the third guide post, a third insertion shaft inserted into the third guide hole extends downward from the lower end of the guide core, and a second silencing buffer is arranged on the guide core, which includes the upper silencing pad facing the top wall of the accommodation cavity and the lower silencing pad arranged at the lower end of the insertion shaft; in the natural state, the upper silencing pad is in contact with the top wall of the accommodation cavity, and in the working state, the lower silencing pad is in contact with the inner bottom of the third guide hole.
 13. The silent switch according to claim 12, characterized in that, the second silencing buffer is integrally injected molding into the guide core, and the second silencing buffer is exposed from the upper side of the guide core to form the upper silencing pad, and exposed from the lower end of the insertion shaft to form the lower silencing pad.
 14. The silent switch according to claim 12, wherein, a third return spring is sleeved on the periphery of the third insertion shaft.
 15. The silent switch according to claim 1, characterized in that, a cavity is reserved in the guide core, and a third silencing buffer is integrally injected molding into the cavity, the third silencing buffer is exposed from the upper side of the guide core to form the upper silencing pad, and the third silencing buffer is exposed from the lower side of the guide core to form the lower silencing pad; in the natural state, the upper silencing pad is in contact with the top wall of the accommodation cavity, and in the working state, the lower silencing pad is in contact with the bottom wall of the accommodation cavity.
 16. The silent switch according to claim 15, characterized in that, the number of the lower silencing pads is two, which are respectively located on both sides of the guide core, and the lower silencing pads mainly consist of a plurality of protrusions.
 17. The silent switch according to claim 15 or 16, characterized in that, the third silencing buffer mainly consists of a central rubber pad and a longitudinal rubber column integrally injected molding on both sides of the central rubber pad, wherein the upper silencing pad is formed at the upper end of the longitudinal rubber column and the lower silencing pad is formed at the lower end of the longitudinal rubber column.
 18. The silent switch according to claim 17, characterized in that, a fourth guide post is protruded upward on the base, and a fourth guide hole is formed in the central axis direction of the fourth guide post; the lower end of the guide core extends downward and is provided with a fourth insertion shaft inserted into the fourth guide hole, a fourth return spring is sleeved on the periphery of the fourth insertion shaft, and the upper end of the fourth return spring contacts the central rubber pad.
 19. The silent switch according to claim 1, characterized in that, the upper silencing pad and the lower silencing pad are soft rubber. 